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CISDOC database

Document ID (ISN)31259
CIS number 79-624
Year 1978
Convention or series no.
Author(s) Radandt S.
Title Results of studies on electrostatic charges during filling of large silos with flammable dusts
Original title Versuchsergebnisse über elektrostatische Aufladungen beim Füllen grosser Silos durch brennbare Stäube [in German]
Bibliographic information Heft 22, Moderne Unfallverhütung, Vulkan-Verlag Dr. W. Classen, Haus der Technik, 4300 Essen, Germany (Fed.Rep.), 1978. p.101-106. Illus. 3 ref.
Abstract Ignition by static electricity during filling of silos may occur by way of 2 mechanisms: electrostatic discharge from conductive components, or a lightning-like discharge from the dust cloud. The article deals with the 2nd mechanism, prevention of which is a difficult matter: value of the charges and their distribution in the silo, electrostatic effect of the level-indicator or thermometer suspension ropes. Measurements during and after filling large silos with soya meal showed that electrostatic charges in the dust cloud do not reach levels necessary for a flash discharge. Petrol vapours may be released in silos filled with soya after oil extraction. Conclusions relate to partition of silos, desorption of soya after extraction, and use of suspended probes.
Descriptors (primary) static electricity; flammable dust; bulk storage bins; explosion research; explosion hazards
Descriptors (secondary) flammable gases; ignition energy; experimental determination; explosion prevention; solvent extraction
Document type E - Books, reports, proceedings
Subject(s) Fire and explosions
Broad subject area(s)
Browse category(ies) Explosions
Electricity